A - Abundant: over 25 seen on a given day in proper habitat/season
C - Common: 5-25 seen per day in proper habitat/season
F - Fairly common: at least one individual per day in proper habitat/season
U - Uncommon: at least one seen per season of occurrence or several seen per year
O - Occasional: one seen per year or less
X - Rare: has occurred in park at least once, but is not to be expected